Spring motor, with motor rewind for calculating machines and the like



6 Sheets-Sheet 1 INVENTOR DE C EASED ATTORNEYS J1me 1955 w. s. GUBELMANNSPRING MOTQR, WITH MOTOR REWIND FOR CALCULATING MACHINES AND THE LIKEOriginal Filed Nov. 6, 1950 ax +m wm o .a 1M lmmmvmul 7105A-3Z11m FIG, 1WILLIAM S. GUBELMANN,

BY WALTER S. GUBELMANN, EXECUTOR BY y 7 J1me 1965 w. s. GUBELMANN SPRINGMOTOR, WITH MOTOR REWIND FOR CALCULATING MACHINES AND THE LIKE OriginalFiled Nov. 6, 1950 6 Sheets-Sheet 2 m T N E V m A r R June 22, 1965 w.s. GUBELMANN 3,190,394

SPRING MOTOR, WITH MOTOR REWIND FOR CALCULATING MACHINES AND THE LIKEOriginal Filed Nov. 6, 1950 6 Sheets-Sheet 5 INVENTOR WILUAM S4GUBELMANN, DECEASED BY WALTER S. GUBELMANN,

EXECUTOR W44. 7,144. & ATTORNEYS J1me 1955 w. s. GUBELMANN SPRING MOTOR,WITH MOTOR REWIND FOR CALCULATING MACHINES AND THE LIKE 6 Sheets-Sheet 4Original Filed Nov. 6,

ATTORNEYS mg m 1M, x m as. M \x A, I fl y 5% {1 5 W mm W In x B June 22,19 5 w. s. GUBELMANN SPRING MOTOR, WITH MOTOR REWIND FOR CALCULATINGMACHINES AND THE LIKE Original Filed Nov. 6, 1950 6 Sheets-Sheet 5VENTOR WILLIAM s. GUBELMANN, DECEASED BY WALTER 5. GUBELMANN,

FJG. 7.

EXECUTOR BY BM Q M.& M ATTORNEY June 22, 1965 w. s. GUBELMANN SPRINGMOTOR, WITH MOTOR REWIND FOR CALCULATING MACHINES AND THE LIKE OriginalFiled Nov. 6, 1950 6 Sheets-Sheet 6 INVENTOR S, GUBE LMANN WILLIAMDECEAfiED BY WALTER S. GUBELMANN,

EXECUTOR BY Banal/$4,, 34, I5

ATTORNEY United States Patent Wee 3,190,394 SPRING MUTGR, WEIH MUTGRREWIND FUR CALCULATING MACHINES AND THE LEKE Wiiliam S. Gubelmann,deceased, late of Convent, N1, by Waiter S. Gubelmann, executor, OysterBay, N.Y., assignor to Reaity dz Industrial Corporation, Morristown,N..l., a corporation of Delaware Application Oct. '7, 1960, Ser. No.61,322, now Patent No. 3,098,609, dated July 23, 1963, which is adivision of application Ser. No. 194,273, Nov. 6, 1955 now Patent No.2,969,177, dated lien. 24, 1961. Divided and this application Nov. 21,1962, Ser. No. 239,380

9 Claims. (Cl. 185-40) This application is a division of copendingapplication, Serial No. 61,322, filed October 7, 1960, for CalculatingMachine Driving Mechanism and the Like, now issued July 23, 1963, asPatent No. 3,098,609, which in turn is a division of patent application,Serial No. 194,273, filed November 6, 1950, for Partial ProductCalculating Machine, now issued lanuary 24, 1961, as Patent No. 2,969,-

This invention relates to motive power means for calculating machinesand the like which may require generally instantaneous power and mayrequire greater motion at one instant than at another.

More specifically, the invention relates to automatically powered motormeans which continually exerts drive forces on each of several drivingunits, each of which operates a different mechanism upon actuation ofinitiating keys appropriate to that driving unit, each of suchmechanisms include controls operable automatically for initiatingsequential and at times overlapping operations of others of the drivingunits,

An object of the invention is to provide a machine in which there is apower drive shaft coupled to a motive source through a spring-typeenergy accumulator, the construction being such as to employ the motivesource to maintain the energy accumulator at all times in a state ofreadiness to turn the power drive shaft without the need forcontinuously running the motive source.

Another object of the invention is to provide, in business machines andthe like, a drive mechanism including a spring motor, and electric motormeans for automatically winding the spring motor according to control bycircuit control means responsive to winding and unwinding of the springmotor for proper operation of the machine, and a manually operable crankmeans for winding the spring motor when the electrical current supplyfails or is otherwise not available.

Still another object of the invention is to provide, in businessmachines and the like, novel drive mechanism comprising a spring motorautomatically wound for providing instantaneous power for operating themachine through several distinct operations before requiring rewinding,a quiet relatively slow starting electric motor for winding the springmotor, and electric motor controls responsive to winding and unwindingof the spring motor for controlling the electric motor and therebymaintaining suitable tension in the spring motor between predeterminedhigh and low tension limits.

An object of the invention is to provide a novel and improvedcalculating machine in which there are several discrete mechanisms,operable independently, a spring type actuator common to said mechanismsand normally in wound condition for operating said mechanisms throughseveral cycles of operation, and a motive source coupled to saidactuator for restoring said actuator to wound condition, said motivesource being brought into operation automatically by said actuator whensaid actuator unwinds a predetermined extent.

Another object of the invention is to provide a novel and improvedcalculating machine in which there is a main power drive shaft connectedto a wound spring energy accumulator which in turn is coupled to amotive source for being maintained thereby in a substantially woundcondition to drive the shaft, the device including a plurality ofdiscrete drive units carried by the main power drive shaft and meansdrivingly coupling the drive units with the power drive shaft for beingturned thereby selectively individuall or in combinations or groups fordriving any section or sections of the calculator as needed for variouscomputation operations.

Still a further object of the invention is to provide a novel andimproved calculator of the type described, in which the main power driveshaft extends through a number of coaxial sleeved-based drive units eachbeing intended for actuating its own related mechanism, such as formultiplication and division computation and for carriage shifting, theconstruction being such as to allow the main drive shaft to turn onlywhen any one of the drive units or combinations thereof are unblockedfor being rotated by the main shaft, and so that blocking of all thedrive units against rotation simultaneously blocks turning of the maindrive shaft, thereby conserving the stored energy provided for rotatingthe main shaft and hence making it feasible to employ a spring-typeenergy accumulator for driving the main shaft, and to use a relativelysmall compact slow-starting type of electric motor for automatically andonly periodically operating the spring motor for restoring the spring tosuitable wound condition.

The above and other objects and advantages of the invention will be morereadily understood upon reference to the following disclosure. It willbe apparent, however, that those skilled in the art will be enabled toapply the teachings of this disclosure to various modifications asintended to be covered by the scope of the appended claims. Thespecification is directed to an exemplary embodiment of the invention asillustrated in the accompanying drawings wherein:

FIGURE 1 is a key-board face view of a calculating machine embodying theinvention, the carriage being shown in fragment in its leftmostposition;

FIGURE 2 is a fragmentary sectioned view of the drive shaft, andincluding, among other parts, three power units, two differentials forconnecting the drive units with the shaft, and a governor for one of thedrive units;

FIGURE 3 is a fragmentary sectional right side View of two differentialsof the driving mechanism;

FIGURE 4 is a sectional left side elevation taken substantially on plane44 of FIGURE 1, and showing a spring motor for driving the main driveshaft also shown in FIGURE 2, means for rewinding the spring and anautomatic control for starting and stopping rewinding operations;

FIGURE 5 is a front elevation as seen from the right of FIGURE 4principally of the spring motor and the rewinding means shown in FIGURE4;

FIGURE 6 is a sectioned front elevation of the spring motor taken onplane 66 of FIGURE 4, the view omitting part of the inner coil springfor clarity;

FIGURE 7 is a fragmentary perspective view of the rewinding gears andcoupling means therebetween;

FIGURE 8 is a fragmentary perspective view of the gear train of thespring motor and rewinding means;

FIGURE 9 is a fragmentary sectioned perspective view of part of theautomatic rewinding control;

FIGURE 10 is a front elevation of the automatic rewinding control;

FIGURE 11 is a fragmentary perspective view of some of the elementsshown in FIGURE 10.

The machine in which the present invention is embodied is disclosed indetail in the afore-mentioned copendi plication, Serial No. 61,322,division, and in the afore-mentioned now issuedpar ent Patent N.2,969,177, to which reference-may be had for a complete disclosure ofvarious details not otherwise set forth herein. A brief summary of themachine and its operations, however, is presentedherewith in order tofacilitate understanding of the invention and its interaction withvarious mechanisms of the machine. I

The calculating machine as shown in FIGURE 1 embodies predeterminedpartial product and quotient representations in a multiplying and adividing mechanism respectively. 'Italso has a shiftable carriage whichcarries the accumulator registers 1 and 2, with a carriage shiftingmechanism; several banks of keys 4 for setting up factors invariouscomputations; and a bank of multiplier keys 5, each of whichserves to initiate a multiplying cycle of operations. subtractioninitiating key 7, division initiating keys 12 and 13, and carrageshifting keys 14, 27, 28 and 29. The machine further has a tabulatingmechanism, an automatically powered motor, and three actuating unitswhich .are constantly urged rotativelyv-by the drivemechanism foractuating the multiplying, dividing, and carriage shifting mechanisms.Hereinafter, for convenience and clarity, each of the actuating unitsisreferred to respectively as the multiplying, dividing, or carriage poweror the respective driv-eunit, as the case may be. I

Results and factors of the various computations are indicated inordinally disposed dials or number wheels of registers 1, 2 and 3 asfollows: Register 1, carried by the carriage, can indicate themultiplier, quotient, or, the

It also includes an addition initiating key 6, a

of which this application a number of items in addition-or subtraction,a the case may be and, alternatively, the.complement of any of theforegoing. Register 2,'also carried by the carriage, can indicate theproduct, dividend, sum, diiference,'-or such complements thereof as aredesired. Stationary register 3 shows for easy reading a currently set upfactor on keys 4. The. numerals on the number wheels are visible throughsuitable apertures on the respective overlying cover plates. 1

This machine is of the type commonly known as a four rules calculator,and performs the arithmetical calculations of addition, subtraction,multiplication and division automatically.

. Multiplication by this machine is direct, as distinguished fromrepeated addition in that the machine multiplies in a manner closelyanalogous to the operational method used in mental computations.Representations of products for digits 0 to 9 times 1 to 9 are providedon multiplication plates which are selected and set-up respectively inaccordance with the separate digits of the multiplicand and eachmultiplier digit. The partial products thus obtained are integrated intothe final product. Depression of a key 4, value 1 to-9 in a bank selectsthe products of that value times the digits 1 to 9. Each multiplier key5 for values 1 to 9 serves as an initiatory control for effectingoperation of the computing or multiplying mechanism and exercises acontrol over the same for setting up the multiplicand digitselected-multiplication element according to the value of the multiplierkey, so that the pertinent partial products (units and tensrepresentations) on each plate are at sensing positions.

The multiplying or computing mechanism includes means for sensing andintegrating the values of the set-up representations and entry meanscontrolled thereby for operating registers 2 and 1 to indicate theproduct and multiplier respectively. A 'cycle of multiplying operationsalso includes the operation of automatically initiating an ordinal shiftof the carriage. Depression of the 0 value key 5 initiates an ordinalshift of the carriage without first having to excite the computingmechanism.

Addition and subtraction calculations are performed by automaticallytreating. the factors thereof as multiplicands and multiplying thefactors by 1. Add key 6 and subtract key 7 are in elfe'ct 1 valuemultiplier keys,

but the cycles of operations instituted thereby do not include theoperation of automatically initiating a shift cycle. Thev product thusobtained of a subtrahend is registered subtractively by the dials of theregister therefor. Selective means is also provided for effectingsubtractive registration of other products.

Selectively presettable keys 8, 9 and 10 are provided for controllingthef direction of shift and non-shift of the carriage,,as formultiplication. With key 8 in depressed position, the automatic ordinalshift of the carriage will be leftward, but with key 10 in depressedposition instead, the ordinal shift of the carriage will be rightward,as indicated by the arrows on those keys. In each instance the carriagewill shift in the opposite direction to a preselected start positionwiththe use of the carriage return key 11. With key 9 in depressed position,the automaticaL 1y operated shift initiating means is normally disabled.

The main driving mechanism comprises journaled shaft 21, FIGURE2,.driving means (not shown here) for constantly urging the shaft torotate, three power units, multiplying 20, carriage 24, and dividing 23,which are rotatably mounted on the shaft, and differentials Sland 32 forso connecting the power units and the shaft that each power unit may,upon liberation, rotate :either individually or concurrently withanother of the units.

Shaft .21 hasinner ball-bearing races33 and 34 secured to its left andright ends respectively. Race 33 is received in an outer bearingrace 35supported in a suitable opening on bracket 36 which is fastened to frameplate 17. Race 34 is received in an outer race 37 which is mounted in asuitable hole on frame member 19. Displacement of shaft 21 leftward andrightwardis prevented respectively by races 33, 35 and races 34, 37. Theraces 35 and 37 are supported against endwise thrust respectively byplate 38, secured to bracket 36, and by plate 39, fastened to framemember 19. .7 I

Power units 20 and 23, and sleeve 26 on which carriage power unit 24' isrotatably mounted, are mounted for rotation on shaft 21 byantifrictional means 41. Gear 40, also rotatable on the shaft 21, isdisposed between race 33 and pinion gear 42 which is secured to theshaft as by the radial pin shown. Both gears will be described presentlywith more particularity in connection with the driving or motor means.

Division power unit 23 is situated between gear 42, and diametral lever43 of differential 31. As seen best in FIGURES 2 and 3, lever 43 issecured to the shaft 21 for rotation therewith and supports a rotatableaxle 44 at each of its ends. A gear 45 and gear 46 are securedrespectively to the left and right ends of each axle 44. Gears '45 areof a larger diameter'than gears 46. Gears 45 are meshed with gear 30 ofthe division power unit 23 and gears 46 are meshed with gear 47 securedto the left end of sleeve 26-. The other end of sleeve 26 has diametrallever 48 of differential 32 secured thereto. This lever also supports ajournaled axle 49 at each of its ends. A gear 50 and gear 51 are securedrespectively to the right and left ends of each axle 49. Gears 50 are ofa smaller diameter than gears 51 which are meshed with gear 25 of thecarriage power unit 24. Gears 50 are meshed with gear 22 which issecured to the left end of multiplying unit 20.

. Whenever rotation of all of the three power units 20, 24 and 23 isprevented, shaft 21 is also held against rotation. The ratios between 7gears 25, 51, 50 and 22 are such that when both gears 22 and 25 cannotrotate, the diametral lever 48 secured to sleeve 26 cannot be rotated.Hence,

, i the gear 47 secured to the other end'of sleeve 26 is also heldagainst rotation when both units 20 (multiplying) and 24 (carriageshifting) are held against rotation. In a simillar manner the ratiosbetween gears 47, 46, 45 and 30 are such that when gears 47 and 30 areheld against rotation, the diametral lever 43 cannot be rotated, andsince lever 43 is secured to shaft 21, as bythe radial pin shown inFIGURE 3, the constantly urged longitudinal shaft 21 is prevented fromrotating. Upon liberation of any one of the three power units, shaft 21rotates clockwise, as when viewed in FIGURE 3. Assuming that thedivision power unit 23 is the one liberated and that the multiplying andcarriage power units and 24 are held, the division power unit with itsgear is free to rotate and gear 47 is held. Diametral lever 43 swingsclockwise with shaft 21 as seen in FIGURE 3, causing gears 46 to rotateand revolve clockwise about held gear 47. Consequently gears 45 alsorotate and revolve clockwise, but the ratios of the gears are such thatgear is rotated counterclockwise as indicated by the arrow in FIGURE 3.

If the division power unit 23 is held and either the carriage shiftingunit 24 or multiplying power unit 20 is liberated, then gear 30 isstationary and gear 47 is free to rotate as shaft 21 rotates. At suchtimes the clockwise swing of lever 43 as seen in FIGURE 3 causesclockwise planetation of gears 45 about the held gear 30. Hence gears 46will also rotate clockwise and tend to rotate gear 47 counter-clockwise.However, the ratios among gears 30, 45, 46 and 47 are such that the gear47 will respond to a greater extent to the planetation of gears 46 andwill definitely rotate clockwise instead.

At times the multiplying power unit 29 or carriage power unit 24 isliberated while the division power unit 23 is operating. When both gears30 and 47 are free to rotate, the resistance of each liberated unit andthe ratio differences between the gears 47, 46, 45 and 30 are such thatas the diametral lever 43 swings clockwise, as seen in FIGURE 3,planetation of gears 46 and 45 is effected whereby gear 30 (divisionpower unit) is rotated counter-clockwise, and gear 47 (carriage shiftingor multiplying power unit) is rotated clockwise. Whenever the carriageshifting or multiplying power units are liberated, the gear 47 and lever48 are rotated clockwise as explained. If the carriage shifting unit 24is the one liberated and the multiplying unit 20 is held, gear 25 isfree to rotate and gear 22 is stationary. At such times, the clockwiseswing of lever 48 will cause clockwise planetation of gears 50 aboutgear 22. Gears 51 will also rotate and re volve as gears 50, but theratios of the gears are such that gear 25 will rotate counter-clockwiseas seen in FIG- URE 3 in response to rotation of gears 51. When gear 25is held and gear 22 is free to rotate, the clockwise swing of lever 48will cause planetation of gears 51 clockwise about gear 25 and the gears50 will tend to rotate the gear 22 counter-clockwise, but the ratiosamong gears 25, 51, 50 and 22 are such that the gear 22 will actuallyvrotate clockwise in response to the planetation of gears 50 with thelever 48.

As also described in the previously mentioned parent patent applicationand patent and in the copending patent application, the carriage powerunit 24 may be liberated while the multiplying power unit 20 isoperating. At such times, both gear 25 and gear 22 are free to rotate.The

resistances of the liberated units and the ratio differences of thegears 25, 51, 50 and 22 are such that as the lever 48 swings clockwise,planetation of gears 50 and 51 is effected whereby gear 25 (carriagepower unit) is rotated counter-clockwise and gear 22 (multiplying powerunit) is rotated clockwise.

Shaft 21 is rotated counter-clockwise (as seen in FIG- URE 4) by aspring powered motor in which the spring 52 may be rewound manually orautomatically. Referring to FIGURE 6, the spring motor comprises shaft53 journaled on main machine frames 17 and 18, a gear 54 secured to theshaft by key 55, another gear 56 rotatably mounted on the shaft and aflat type spring 52 between the gears and coiled about the hub 57 ofgear 54. The inner end of the spring is hooked on to stud 58 on the hub,and the outer end of the spring is hooked in slot 59 on casing 60 formedon gear 56. The rim of easing 6t) is received in a recess therefor ongear 54. Thus a drum is formed for the spring 52 which is so wound andtensioned as to rotate the gear 56 (FIGURE 4) clockwise for 6counter-clockwise rotation of meshed gear 42 and shaft 21. Spring 52also tends to rotate gear 54 counter-clockwise, but such rotation ofgear 54 is prevented, as will be explained. Clockwise rotation of gear54 rewinds the spring 52.

For reloading the spring 52 manually, the left end of shaft 53 (FIGURE6) is formed with a threaded hole to receive the illustrated threadedend portion (right hand threads) on a crank 61. Clockwise turning ofcrank 61 (FIGURE 4) will rotate shaft 53 and the gear 54 keyed theretoclockwise.

For automatic reloading of spring 52, a small conventional electricmotor 62 may be utilized. As will be described presently, means areprovided for starting such a motor when the spring unwinds a certainextent and for stopping the motor when the spring is rewound apredetermined extent. The electric motor 62 is mounted on a frame plate15 and has gear 63 secured to its rotor 64. Gear 63 is meshed with gear65 rotatably mounted on shaft 66 which is fixed on frame members 17 and18, FIGURE 5.

Referring again to FIGURE 4, clockwise rotation of gear 63 will rotategear 65 counter-clockwise. Gear 65 carries a pawl 67 pivoted at 68.Spring 69, fastened to the pawl and to stud 70 on the gear 65, urges thepawl counter-clockwise into engagement with a ratchet wheel 71 which issecured to a gear '72, FIGURE 7. Gear-wheel unit 72-71 is rotatablymounted on hub 73 of gear 65, and the gear 72 is meshed with rewindinggear 54, FIG- URE 8. The engagement between pawl 67 (FIGURE 7), andra.chet wheel 71 is such that as gear 65 (FIGURE 4) is rotatedcounter-clockwise by the motor 62, the ratchet wheel-gear unit 7172 isalso driven counterclockwise, whereby the gear 54 is rotated clockwiseto re wind the spring 52. Through pawl 67, the clockwise urgence of gear'72 by spring influenced gear 54 tends to drive gear 65 clockwise. Also,when the gear 72 is rotated counter-clockwise, as in response to themanual clockwise rotation of gear 54, by crank 61, pawl 67 merelyratchets on the ratchet wheel 71. Hence, at such times gear 65, which isyieldably held against counter-clockwise rotation, as will be described,and the rotor 64 of the electric motor 62 are not actuated. A detentbrake means 74, pivoted on stud 75 on frame 17, FIGURE 7, is urged intoengagement with gear 65 by torsion spring 76, fastened to the detent andto stud 77 on frame plate 17. The detent '74- is formed with teeth 78(FIGURE 4) for so engaging the gear 65 that only clockwise rotation ofgear 65 (as in response to urgence of spring 52) is blocked. When gear65 is turned counter-clockwise, gear 65 coacts with teeth 7 8 so as torock the detent clockwise. The teeth 78 as seen in FIGURE 4 are shapedfor this purpose. The tension of spring 76 is sufiicient to hold gear 65while pawl 67 and wheel 71 are ratcheting during manual rewinding ofspring 52.

An electromagnetic means or solenoid 79, secured to the frame of themachine, is provided for holding detent 74 disengaged from gear 65during automatic rewinding. The electromagnetic means is energized, aswill be explained, from the time the electric motor 62 is started untilit is stopped. Also, at the outset of each operation of the motor, thedetent '74 is rocked clockwise, as explained, due to the shape of teeth78, which movement is sufficient to move ferrous tab 8t) formed on thedetent into the magnetic field of the magnet means 79, whereupon magnetmeans 79 then draws the detent further clockwise so that teeth 78 arenot in contact with gear 65. Thus the frictional restraint of detent 74against counterclockwise rotation of gear 65 is removed early in anautomatic rewinding operation and ratcheting is prevented.

Operation of electric motor 62 and energization of magnetic means 79 iscontrolled, in one preferred form, by a tension control meanscomprising, primarily, an automatically operated toggle switchmechanism. Referring to FIGURE 10, 31 represents the switch blade thatis received between pairs of spring contacts 32 so as to simultaneouslyclose the circuit from 83 through'wires 84 and 85 to the electric motorand the magnet means 79 respectively. j Contacts 82 are mounted-on rearframe 16 (FIG- URE 4) and are insulated therefrom, and switch blade 81(FIGURE 10) is fastened to switch member 86 which is securedto the freeend of switch lever'87. Member 86 is formed of any suitablenon-conducting material. The other end of lever 87 is mounted pivotallyon stud 88 on An upwardly extending lever 90 (FIGURE 11) is also pivotedon stud 88, and spring91 is fastened to studs 92,

and 93 on levers 90 and 87 respectively. Spring 91, (FIG- UR'E l) servesto swing the lever 87 and switch blade 81 rightward from the normalposition shown in FIGURE to close the circuits, and to swing themleftward, back to normal position, to open the circuits when the lever90 is moved sufficiently to carry the spring past pivot 88 respectivelyrightward in responsev to unwinding of the main spring 52 and leftwardin response to the rewinding of the main spring. Studs 94 and 95 onbracket 89 are providedfor limiting the extent of leftward and rightwardmovement of lever 87. I

One end of a lateral link 96 is pivotally connected at 97 (FIGURE 11) tothe upper end of lever 90 and the other end of the link is pivotallyconnected at 98 to bifurcated member 99. The furcations on member 99extend forwardly so as to be received in an annular groove 100 (FIGURE9) ondisc 101. The arrangement is such that a predetermined extent ofrectilinear movement of the of gear 42.

disc 101 rightwardly and then leftwardly will actuate lever 90, FIGURE11, to respectively effect on and 01f switching of the circuits.

Disc 101 (FIGURE 9) is threaded to receive screw portion 102 on shaft103 which is journaled on bracket 89, FIGURE 10. Disc 101 is alsomounted slidably on rods 104 (FIGURE 9) spaced radially from shaft 103and parallel thereto. The rod-s 104 are secured at their ends on collarmember 105 and toothed wheel 106 which are mounted rotatably on shaft103 respectively to the left and right of the screw portion.

Thus parts 106, 104 and 105 are formed as a rotatable unit for turningdisc 101 clockwise, as will be described. Another toothed wheel 107,similar to 106 is secured to shaft 103 toward its left end for rotatingthe shaft clockwise. The cooperation between the disc 101 and the shaftis such that clockwise rotation of the disc forwardly of.

the shaft causes-the disc to travel rightwardly and clockwise rotationof the shaft forwardly of the disc effectuates leftward traverse of thedisc.

Wheel 106 is formed with teeth 103 about its periphery and is so alignedwith gear 42 that the teeth 108 cooperate with axially elongated toothor cog 109 on the gear. During each counter-clockwise revolution of gear42 in response to unwinding of the main spring, cog 109 engages one ofthe teeth 108 to turn wheel 106 clockwise a certain angular amount. Theratios between the screw 102, disc 101, wheel 106 and gear 42 are suchthat the disc will traverse rightwardly sufficiently to initiaterewinding operations before the main spring is fully unwound orexpended.

Thus continuous cycling-of the machine is made possible. Wheel 107 isformed with teeth 110 about its periphery, and is in alignment with gearwhich also carries a cog. The relationship between wheel 107 and gear 40is similar to that between wheel 106 and gear 42. As the gear 40 rotatescounter-clockwise in response to rewinding operations, wheel 107 isrotated clockwise by the cog to traverse the disc 101 leftwardly to openthe circuits, thereby to terminate. the rewinding operation at "aboutthe time the main spring is fully rewound.

106. During the latterpart of each actuation of the wheel by gear 42.,the roller 112 cooperates with teeth 108 to urge the wheel clockwise tothat position in which tooth 109 will engage a tooth 103 in an ensuingrevolution In this manner, it is seen that the. constant-energyreplenishment byrewinding .of the spring'52 ,causes the springpoweredmotor to act as an energy accumulator and hence ready at all times toinstantly drive the main power shaft 21. Also, continuous rotation ofmain shaft 21 is possible without the need for running the motivesource, such as motor 62-, atall times. 4

Although'a detailed description of a preferred embodiment of theinvention has been set forth herein," it is understood that variouschanges may be made in size, shape, materials and arrangement, withinthe spirit and scope of the invention, and that applicantdoes not wish14A main operating mechanism for a calculating ma chine having a frame,said operating mechanism comprising a shaft journaled on said frame; aninput gearv secured to said shaft for rotating therewith; an output gearspaced axially. from said input gear and rotatably. mounted on saidshaft; a spring coiled about said shaft and fixed at its inner end tosaid input gear and fixed at its outer end to said output gear for beingwound upon rotation of said shaft relative to said output gear and foreffecting. rotation of said output gear; manually turnable crank meansreleasably engageable with said shaft for rotating said shaft andthereby to manually wind said spring; motor means for winding saidspring automatically; a gear train connecting said motor means with saidinput gear for rotat-, ing said input gear, said gear train comprising apinion carriedby said motor means and rotatable thereby, and first andsecond coaxial gears, said first coaxial gear being meshed. with saidpinion and said second coaxial gear being meshed with said input gear, aratchet wheel secured to said second coaxial gear for rotationtherewith, pawl means pivotally mounted on said first coaxial gearforrotary movement therewith and releasably engaging said ratchet wheel forrotating said second coaxial gear in unison with said first coaxial gearwhenever said motor means is rotated, said pawl means permittingrotation of said second coaxial gear forwardly relative to said firstcoaxial gear whenever said input gear is rotated manually by said crankmeans; a detent pivotally mounted on said frame and normally engagingsaid first coaxial gear for holding said first coaxial gear againstrotation; a normally deenergized electromagnetic means for disengagingsaid detent from said first coaxial gear upon commencement of automaticWinding of said spring by. said motor means and energization of saidelectromagnetic means; circuit means connected to said motormeans andsaid electromagnetic means for' connecting them to an electric powersource, and a normally open switch means interposed in said circuitmeans and operable responsive to said output gear upon a predeterminedamount of rotation thereof by said spring for closing said circuit meansfor operating said motor means and energizing said electromagneticmeans, and operable responsive to said input gear upon a predeterminedamount of rotation thereof by said motor means for opening said circuitto said motor means and to said electromagnetic means for de-energizingsaid motor means and electromagnetic means.

2. A drive mechanism for a calculating machine having a frame, saiddrive mechanism comprising a shaft journaled on said frame, an inputgear secured to said shaft for turning therewith; an output gear spacedaxially from said input gear and rotatably mounted on said shaft; aspring coiled about said shaft between said input and output gears andfixed at its inner end to said input gear and fixed at its outer end tosaid output gear for being wound upon rotation of said input gearrelative to said output gear and for effecting rotation of said outputgear; crank means engageable with said shaft for rotating the same formanually winding said spring; motor means for winding said springautomatically; circuit means connected to said motor means andconnectable to a source of electric current; a gear train connectingsaid motor means with said input gear, said gear train comprising apinion carried by said motor and rotatable thereby, and first and secondcoaxial gears, said first coaxial gear being meshed with said pinion andsaid second coaxial gear being meshed with said input gear, a ratchetwheel secured to said second coaxial gear for rotation therewith, pawlmeans carried pivotally on said first coaxial gear and engaging saidratchet wheel for rotating said second coaxial gear in unision with saidfirst coaxial gear when said first coaxial gear is rotated by said motormeans, said pawl means permitting said second coaxial gear to rotateforwardly relative to said first coaxial gear during manual winding ofsaid spring; a detent pivoted on said frame and engaging said firstcoaxial gear for holding said first coaxial gear against reverserotation in response to said spring; a normally open switch meansinterposed in said circuit means and operable responsive to apredetermined amount of rotation of said second gear for closing saidcircuit means for operating said motor means, and responsive to saidinput gear upon a predetermined amount of rotation thereof for openingsaid circuit means for stopping operation of said motor means.

3. A drive mechanism for a calculating machine having a frame, saiddrive mechanism comprising a shaft journaled on said frame, an inputgear secured to said shaft for rotation therewith, an output gear spacedaxially from said input gear and rotatably mounted on said shaft, aspring coiled about said shaft between said input and output gears andfixed at its inner end to said input gear and at its outer end to saidoutput gear for rotating said output gear and for being wound uponrotation of said input gear relative to said output gear; motor meansfor winding said spring; a gear train connecting said motor means withsaid input gear and comprising a drive gear; a detent pivotally mountedon said frame and engaging said drive gear for normally holding saidgear train and said input gear against rotation; a normally de-energizedelectromagnetic means for disengaging said detent means from said drivegear upon commencement of winding of said spring by said motor means andenergization of said electromagnetic means; circuit means connected tosaid motor means and said electromagnetic means for connecting them toan electric power source, and a normally open switch means interposed insaid circuit means and operable responsive to said output gear upon apredetermined amount of rotation of said output gear by said spring forclosing said circuit means for operating said motor means and energizingsaid electromagnetic means, said switch means being operable responsiveto said input gear upon a predetermined amount of rotation of said inputgear by said motor means for opening said circuit means again, therebyto stop operation of said motor means and de-energize saidelectromagnetic means.

4. A driving device for calculating machines, comprising a shaftsupported for rotation, an input gear secured to said shaft for rotationtherewith, an output gear spaced axially from said input gear androtatably mounted on I said shaft, 2. spring coiled about said shaftbetween said gears and fixed at its inner end to said input gear and atits outer end to said output gear for rotating said output gear and forbeing wound upon rotation of said input gear relative to said outputgear; a motor for winding said iii spring; a gear train connecting saidmotor with said input gear and comprising a drive gear; a pivoted detentreleasably engaging said drive gear for therethrough blocking reverserotation of said input gear and of said gear train by said spring;circuit means connected to said motor for connecting the same to anelectric power source; a normally open toggle switch interposed in saidcircuit means; an output shaft supported for rotation; first and secondpinions meshed with said input and output gears respectively, said firstpinion being rotatably mounted on said output shaft and said secondpinion being fixed to said output shaft; a first cog carried by saidfirst pinion for rotation therewith, a second cog carriedby said secondpinion for rotation therewith; a switch shaft mounted for rotation; afirst wheel secured to said switch shaft and comprising a plurality ofteeth projections so disposed in the path of rotation of said first cogthat once in each revolution of said first pinion said first cog engagesa said tooth projection of said first wheel and rotates said first wheela predetermined extent; a second wheel rotatably mounted on said switchshaft and comprising a plurality of teeth projections so disposed in thepath of rotation of said second cog that once in each revolution of saidsecond pinion said second cog engages a tooth projection of said secondwheel and rotates said second wheel a predetermined extent; a collarrotatably mounted on said switch shaft and spaced from said secondwheel, a plurality of longitudinally extended rods for securing saidcollar to said second wheel for rotation of said collar in unison withsaid second wheel; said switch shaft being threaded between said collarand said second wheel, a disc slidably mounted on said rods fortraversing therealong and for being rotated by said rods together withsaid second Wheel, said disc being formed with an annular groove aboutits periphery and with a threaded bore for threadedly engaging saidthreaded portion of said switch shaft so that whenever said second Wheelrotates relative to said first wheel said disc is caused to traverseaxially in a first direction and whenever said first wheel rotatesrelative to said second wheel said disc is caused to traverse axially ina second direction, opposite to said first direction, and a yoke meansconnected to said toggle switch and engaging said disc in said groovefor being traversed selectively thereby in said first and seconddirections for operating said switch to close said circuit upon apredetermined extent of traverse of said disc in said first directionand to open said circuit means upon a predetermined extent of traverseof said disc in said second direction.

5. A drive mechanism for a calculating machine having a frame, saiddrive mechanism comprising a shaft journaled on said frame; an inputgear secure-d to said shaft for rotation therewith; an output gearspaced axially from said input gear and mounted on said shaft forrotation thereon; a drive spring coiled about said shaft between saidinput and output gears and fixed at one end to said input gear and fixedat its other end to said output gear for being wound upon rotation ofsaid input gear relative to said output gear for effecting rotation ofsaid output gear; crank means engageable with said shaft for manuallyrotating said shaft to wind said spring; electric motor means forwinding said spring automatically; circuit means connected to said motormeans and connectable to a source of electric current; a gear trainconnecting said motor means with said input gear, said gear traincomprising a pinion carried by said motor and rotatable thereby, andfirst and second coaxial gears, said first coaxial gear being meshedwith said pinion and said second coaxial gear being meshed with saidinput gear, a ratchet wheel secured to said second coaxial gear forrotating therewith, pawl means carried pivotally on said first coaxialgear and engaging said ratchet wheel for rotating said escond coaxialgear in unison with said first coaxial gear when said first coaxial gearis rotated by said motor means, said pawl means permitting said secondcoaxial gear to rotate forwardly relative to said first coaxial gearduring manual winding of said spring; a detent pivotally carried on saidframe and releasably engaging said first coaxial gear for holding saidfirst coaxial gear against reverse rotation in response to said spring;and switch means comprising spaced first and second terminals connectedto said circuit, a fixed stud, and a blade pivoted on said fixed studand rockable between closed circuit and open circuit positions, at saidclosed circuit position said blade contacting said terminals tointerconnect said ter minals thereby to energize said motor, and at saidopen circuit position said blade is disengaged from said terminalsthereby disconnecting said terminals from each other and stoppingoperation of said motor, a blade-moving lever pivoted on said fixedstud, a first lug carried by said switch blade spaced from said fixedstud, a second lug carried by said blade-moving lever spaced from saidfixed stud, tensioned springmeans connected to said first and secondlugs for rocking said blade to open circuit and closed circuit positionsin response to angular movement of said blade-moving lever respectivelyin one direction to one side of said fixed stud-and in the oppositedirection to the other side of said fixed stud, and means operable bysaid input and output gears and engaging said blade moving lever formoving said blade-moving lever inv said one direction upon apredetermined amount of rotation of said input gear and for moving saidblade-moving leverin input member for rotating said input member formanually winding said spring motor, primary motor means operable forrotating said input member and automaticallyi winding said spring motor,a gear train connecting said primary motor means with said input memberfor rotating said inputmember, a one-way clutch meansinterposed in saidgear train for transmitting the torque of said primary motor meanswhenever said primary motor means is operated and for permittingrotation of said input member forwardly of said primary motor meanswhenever said input member is rotated manually'by said crank means, adetent means normally engaging said gear train for holding said geartrain. and said motor means against reverse rotation by said springmotor when said said opposite direction upon a predetermined'amount of arotation of said output gear;

6. A drive mechanism comprising a spring motor, a

spring means in said spring motor, an input member rotatable forintensifying the tension in said spring means,- an outputmemberrotatable by the tension in said spring means, a manually turnablecrank means releasably engageable with said input member for rotatingsaid input member for manually winding said spring motor, primary motormeans operable for-rotating said input member for winding said springmotor, a gear train connecting said primary motor means with said inputmember for rotating said input member, said gear train comprising atleast a first gear and a second gear, said first gear being connectedwith said motor means for rotation thereby upon operation of said motormeans and said second gear being connected with said input'member vforoperation" therewith, a one-way clutch means between said first andsecond gears constructed and arranged for rotating said second gear inunison withsaid first gear whenever said motor means is operated andfor-permitting rotation, of. said second gear forwardly of said firstgear whenever said input member is rotated manually by said crank means,a detent means normally engaging said first gear for holding said firstgear and said motor means against rotation -by said spring motor, anormally de-energized electromagnetic means for disengaging saiddetentmeans from said first gear upon winding of said spring motor by saidprimary motor means and energization of said electromagnetic means,circuit means connected to said motor 7 motor for closing said circuitmeans for, operating said primary motor means is not operating, anormally deenergized electromagnetic means. for disengaging said detentmeans from. said gear train upon operation of said primary motor meansand the energization of said electromagnetic means, circuit meansconnected to said motor means and said electromagnetic means forconnecting them to an electric power source, and a normally open switchmeans interposed in said circuit means and 0perable responsive to saidoutput member upon a predetermined amount of rotation thereof by saidspring motor for closing said circuit means for operating said primarymotor means and for energizing said electromagnetic means, and operableresponsive to said inputimember upon a predetermined amount of rotationthereof by said primary motor means for opening said circuit to saidprimary motor means and to said electromagnetic means for de-energizingsaid electromagnetic means and halting 1 operation of said primary motormeans,

primary motor means and energizing said electromagu spring means in saidmotor, an input memberro-tatable,

for intensifying the tension of said spring means in said spring motor,an output member rotatable by the tension of said spring means in saidspring motor, a manually turnable crank means releasably engageable withsaid said electromagnetic 8. A drive mechanism comprising aspring.motor, a spring means in said spring motor, an input member rotatablefor intensifying the tension of said spring means in said spring motor,an output member rotatable by the tension in said spring motor, amanually turnable crank means releasably engageable with said inputmember for rotating said input member for manually winding said springmotor, primary motor means operable for rotating said input member forautomatically winding said spring motor, a one-way clutch means betweensaid primary motor means and said input'member for transmitting thetorque of said primary motor means whenever said primary motor means isoperated and for permitting rotation of said input member forwardly ofsaid motor means whenever said input member is so rotated manually bysaid crank means, a one-way brake means norm-ally connected with saidmotor means for holding said motor means against reverse rotation bysaid spring motor when said motor means is not operating, anormallyde-energized electromagnetic means for disconnecting said brakemeans from said motor means upon operationof said motor means and theenergization of said electromagnetic means, circuit means connectedtosaid motor means and said electromagnetic means for connecting them toan electric power source,,and a normally open switch means interposed insaid circuit means and operable responsive to said output member upon apredeterminedamount .of rotation thereof by said spring motor forclosing said circuit means for: operating said primary motor means andenergizing said electromagnetic means, and operable responisive to saidinput member upon a predetermined amount of rotation thereof by saidmotor means for opening said circuit to said motor means and to saidelectromagnetic means for de-energizing said electromagnetic means andhalting said motor means.- I

9. A drive mechanism comprising a spring motor means having an inputmember rotatable for intensifying the tension in said spring motor meansand an output member rotatable by the tension insaid spring motormeans,a powersounce means operable for rotating said input member to wind saidspring'motor means, a brake means normally engaging said power sourcemeans for holding said power source means against reverse rotation bysaid i3 M- spring motor means when said power source means is notReferences Cited by the Examiner operating, and a tension control meansresponsive to said UNITED STATES PATENTS output member upon apredetermined amount of rotation thereof by said spring motor means fordisengaging 1,085,477 1/14 mumps 185-43 2,252,775 8/41 Llchtenstein 185-40 X said brake means from said power source means and for 5 startin oerati-on of said ower source means, said tension 05min means being f ilrther responsive to said input JULIUS WESL Pnmm'y Exm'lmer' member upona predetermined amount of rotation thereof EDGAR W. GEOGHEGAN, Examiner.for reengaging said brake means with said power source means and forstopping operation of said power source 10 means.

3. A DRIVE MECHANISM FOR A CALCULATING MACHINE HAVING A FRAME, SAIDDRIVE MECHANISM COMPRISING A SHAFT JOURNALED ON SAID FRAME, AN INPUTGEAR SECURED TO SAID SHAFT FOR ROTATION THEREWITH, AN OUTPUT GEAR SPACEDAXIALLY FROM SAID INPUT GEAR AND ROTATABLY MOUNTED ON SAID SHAFT, ASPRING COILED ABOUT SAID SHAFT BETWEEN SAID INPUT AND OUTPUT GEARS ANDFIXED AT ITS INNER END OF SAID INPUT GEAR AND AT ITS OUTER END TO SAIDINPUT GEAR FOR FORATING SAID OUTPUT GEAR AND FOR BEING WOUND UPONROTATION SAID INPUT GEAR RELATIVE TO SAID OUTPUT GEAR; MOTOR MEANS FORWINDING SAID SPRING; A GEAR TRAIN CONNECTING SAID MOTOR MEANS WITH SAIDGEAR FOR AND COMPRISING A DRIVE GEAR; A DETENT PIVOTALLY MOUNTED ON SAIDFRAME AND ENGAGING SAID DRIVE GEAR FOR NORMALLY HOLDING SAID GEAR TRAINAND SAID INPUT GEAR AGAINST ROTATION; A NORMALLY DE-ENERGIZEDELECTROMAGNETIC MEANS FOR DISENGAGING SAID DETENT MEANS FROM SAID DRIVEGEAR UPON COMMENCEMENT OF WINDING OF SAID SAID SPRING BY SAID MOTORMEANS AND ENERGIZED OF SAID ELECTROMAGNETIC MEANS; CIRCUIT MEANSCONNECTED TO SIAD MOTOR MEANS AND SAID ELECTROMAGNETIC MEANS FORCONNECTING THEM TO AN ELECTRIC POWER SOURCE, AND A NORMALLY OPEN SWITCHMEANS INTERPOSED IN SAID CIRCUIT MEANS AND OPERA ABLE RESPONSIVE TO SAIDOUTPUT GEAR UPON A PREDETERMINED AMOUNT OF ROTATION OF SAID OUTPUT GEARBY SAID SPRING FOR CLOSING SAID CIRCUIT MEANS FOR OPERATING SAID MOTORMEANS AND ENERGIZING SAID ELECTROMAGNETIC MEANS, SAID SWITCH MEAND BEINGOPERABLE RESPONSIVE TO SAID INPUT GEAR UPON A PREDETERMINED AMOUNT OFROTATION OF SAID INPUT GEAR BY SAID MOTOR MEANS FOR OPENING SAID CIRCUITMEANS AGAIN, THEREBY TO STOP OPERATION OF SAID MOTOR MEANS ANDDE-ENERGIZE SAID ELECTROMAGNETIC MEANS.